Pipe-expander



UNITED STATES T T OFFICE-.1

GEORGE o. VAN KEUREN, OF. nnononv, ILLINOIS. J

PIPEY-EXPANDIER.

SPECIFICATION forming part of Letters Patent No. 381,094, dated Apri110 188 8.i

Application filed December 9 1887. Serial No. 257.432." (No model.)

To all whom it may concern: h I p Be itknown that I, GEORGE GVANKEUEEN, a citizen of the United States of America, residing at Duquoin, in the county of Perry and State of Illinois, have invented certain new and useful Improvements in Flue Expanders, of which the following is a specification, reference being had therein to the accompanying drawings. a r 7 This invention pertains to certain new and useful. improvements in flue or tube expanders, having for itsobject the provision of a device simple in construction and combining durability and cheapness.

The inventionis so constructed as tobeap- I plicable to two sizes of fluesor tubes, whereby it is rendered doubly useful. I

. In the accompanying drawings, Figure 1 is a view in perspective of my invention. 'Fig.

2 is a side elevation. Fig. 3 is a sectional view. thereof, and Fig. 4 is a detailview.

Referring to the drawings, A'represents a circular plate or head, having a continuous,

projecting flange, a, as shown, and is provided with a centraltcircular opening, a, and three (more or less) radiating slots, at, extending from said central opening. I h

To the inner surface of the plate or head A are rigidly secured or formed integral therewith three approximately V-shaped lugs or arms, I) I), having their vertexes pointing toward the center of the central opening -Withi n the radiating slots a are disposed rollers 0, provided each with a circular groove, 7;, for fittingwithin said slots, said rollers being held therein'as against displacement when not in use .by means of a wire ring, D, "disposed in a groove in thewall of the central circular opening a, the ends of said ring be-.,

ing unconnected.

E is a tapering mandrel of ordinary construction designed to be inserted through the central opening, a, of the'plate or head, so as to act on the rollers 0.

Proof what has been said it will be seen that upon placing my flue-expander on the end of a a tube or flue its circular flange a will encompass the outer surface of said tube or flue, and

tween the rollers the latter (will bemo'ved in by driving .the tapering mandrel tightly be-I end of the flue or tube, causing the expansion thereof aroundthe opening in the boiler-head, whereby it is securely held in position; It will alsobe seen that the lugs or arms guide the rollers in their movement and prevent any deflection thereof from their proper positions;

and by, reason of the-ends of said lugs or arms being unconnected, or openings left therein between, the rollers can m'oveoutwardly, and

thereby one device can be-used to o'perateon" two sizes of fiues or tubesf i If desired, without'departing' from thespirit of my invention, the length of the'circularflange'a can besho'rtened or dispensed with,

soas to provide means for operating on flues having but a small projecting portion.

My improved flue or tube expander is extremely simple, cheap,;anddurable, and, as-it comprises but few parts, is not liable'toget" out of order'or'to become disarranged;

I claim as-my 1nv-ention 1. Ina flue-expander,-the'conibiuatiomwith the plate or head having a centralfopening andradiating slots and a groove or recess, of 7 5 Q the rollers having their necks in said slots,i

the ring disposed in saidgroove or recess,

having its ends disconnected, the V-shaped lugs or arms projecting from said plate or head,

and the taperingmandrel designed to be inserted through said central opening'and bear against the said ring and ol t ntially as shown and described.

2. The combination, with tlie late or head '1' having the centralopening provided with a circular'groove and the-radiati'ng'slotaIof the rollers secured in slots, and the ringhav'ing its end disconnected and disposed: in'xsaid groove for' retaining said rollers in position, substantially as shown and described; p

in presence of two witnesses; 1 a

GEORGE (l. VAN KEUREN. Witnessesr q WV. 11. EAST,

i V L. SrSMITH- ,In testimony whereof I affix' my signature- 5 their respective slots, and thus actupon the V 

